Answer
Please see below.
Work Step by Step
The first term in the expansion of $(a+b)^n$ is $a^n$. The exponents on $a$ decrease by $1$ in each successive term and end with the exponent of $0$ ($a^0=1$).
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter 10 - Section 10.4 - Mathematical Induction - Exercise Set - Page 1086: 50
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